8.11.3 Charge-air coolant – Draining
Preconditions
☑
Engine is stopped and starting disabled.
Special tools, Material, Spare parts
Designation / Use
Part No.
Qty.
Sealing ring
(→ Spare Parts Catalog)
WARNING
Coolant is hot and under pressure.
Risk of injury and scalding!
• Let the engine cool down.
• Wear protective clothing, gloves, and goggles / safety mask.
Charge-air coolant – Draining
1.
Provide an appropriate container to drain the
coolant into.
2.
Turn breather valve on coolant expansion
tank counterclockwise to the first stop and
allow pressure to escape.
3.
Continue to turn breather valve counterclock-
wise and remove.
4.
Draw off precipitated corrosion inhibitor oil
from the expansion tank through filler neck.
5.
Open drain plug (1) and drain off coolant at
the charge-air coolant pump.
6.
Insert drain plug (1) with new sealing ring on charge-air coolant pump and use torque wrench to tighten to
specified tightening torque.
Name
Size
Type
Lubricant
Value/Standard
Screw
M14x1.5
Tightening torque
35+3 Nm
7.
Fit breather valve on filler neck and close it.
148 | Low-Temperature Circuit | MS150100/06E 2017-08
TIM-ID: 0000031874 - 003
